Aerial logging system



R. H. WHITE.

AERIAL LOGGING SYSTEM.

` APPLICATION FILED. 1AN.27, 19211 1,41 1,144.

Patented Mar. 2s, 1922.

R. H. WHITE.

AERIAL LOGGING SYSTEM. APPLICATION FILED 1AN.21.1921.

Patented Mar. 28, 1922.

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` line when the fall UNITED STA ROBERT H. WHITE, or EvERETT, WASHINGTON.

AERIAL LOGGING SYSTEM.

Specication of Letters Patent.

Patented Mar. 28, 1922.

Application led January 27, A1921. Serial No. 440,439.

To allee/1.0m it may concern Be it known that I, ROBERT H. WHITE, a citizen of the United States, residing at Everett, in the county of Snohomish and State of lVashington', have invented certain new and useful Improvements in Aerial Logging Systems; and I do declare the f ollowing to be a full, clear, and exact descrlption of the invention, such `as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved aerial logging system or railway and one object of the inventionis to provide a railway of the character described in which the fall block may be drawn downwardly from the carriage and to one side of the carriage and trolley c'able upon which the carriage moves,'the carriage,y swinging transverselyr upon the trolley cable when thel fall block is drawn to one side.

Another object ofthe invention is to so construct the carriage that the hoisting line upon which the fall block is mounted may extend through the carriage in a straight block is drawn upwardly thus permitting the weight of the load to be evenly distributed upon the trolley cable and hoisting cable.

Another object of the invention is to so construct the carriage that the trolley cable and hoisting cable may extend through ythe carriage between side plates thereof and between upper and lower` rollers positioned between the side plates, the hoisting cable when drawn tight serving not only as a second trolley cable but further serving as means engaged by the lower rollers to prevent the carriage from moving upwardly.

Another object of the invention is to so construct this carriage that the fall block when drawn upwardly will be out of engagement with the lower and upper rollers engaged by the trolley cable and hoisting cable.

Another object of the invention is to so construct this railway that the carriage 'ma be readily moved longitudinally thereof an o stopped at any desired point upon the trolleycable and the fall block permitted to move downwardly with the carriage at any desired point upon the trolley cable. o

Another object of the invention'is to so construct this railway that the haul back line for the fall block may be selectively extended to draw the fall block to either side of the trolley cable.

Another object of the invention is to so construct this railwaythat no brakesy are necessary for the carriage and no positive connection is necessary between the. fall block and carriage` v Another object of the invention is to so construct this railway that the hoisting cable, haul back line or cable, and lines connected with opposite end portions of the carriage may be wound upon separate drums of an engine thus vpermitting -each line to be provid d with separate winding means for drawing upon the line or releasing the line i when desired. Y

Another object of the inventionis to provide a railway which will be comparatively simple in construction and in which the carriage will beof a-simple construction and very strong and durable and not liable to jam upon the trolley cable or hoisting cable.

Thisnvention is illustrated in the accompanying drawings, wherein:

j Figure 1 is a perspective view showing the logging system or .railway in operation.

Figure 2 is showing the carriage and fall block .in elevation, a portion of'one of the sideplates of the carriage being broken away. Figure 3 is a longitudinal"sectional view through the carriage taken along the line 3-3o1` Fig.' 2.-

This improved logging system or railway .is intended to be used for moving logs from the point at which they willrest lwhen the trees are cut and divided into logs to a point where the logs are to ing vupon a railway logging train. This aerial railway is provided with standards or posts 1 and 2 which may ifso desired, be il'ormed by lacing posts similar to telegraph posts 'into tlie ground but which will preferably be formed by selecting trees at a suit able distance apart and cutting the limbs and upper portion vof the trunk away thus 'leaving' the balance standing to form the post or standard. Pulleys 3, 4, '5,6 and 7 are connected with the upper portion of the post or standardk 1 and pulleys 8 and 9 are connected with the upper portion of the post or standard 2. At suitable points, trees will be cut thus leaving stumps 10,11, 12, 13,14 and 15 and pulleys 16 will be connected with the stumps 11,12 and 13 and similar an l enlarged fragmentary view be piled ready for load- `tra and f 2.

jin'dicated by dotted lines. i seen that this hoisting cable will extend pulleys 17 will be connected with the stumps 14C and 15. The pulleys 17 will beso connected with the stumps 14 and 15 that they can be easily disconnected and moved over and connected with similar stumps; 1l and 15 upon the opposite sides of the postseli lt will thus be seen that the haul back line or cable 18 'which is wound upon the drum` 19 of the stationary engine 2O and passed through the pulleys 6 and 17, may be caused to vextend upon either sideV of the posts or standards 1 and 2 desired.

The carriage 21 is mounted uponV a trolley lcable 22 which extends through the pulleys 3 'andS and has one end portion connected with the` stuinp 13 and` the secondv end portion connected with the stunip 10. This trolley cablerwill be stretched tight so that the carriageV caninove easily along the same fromv one -postlor standard to the second. Thiswcarriage is constructed as' shown in Figs; 2f4 and 3 -and vfrom an inspectionof these figures, it will be seen that the carriage is provided with side plates 23 which 'are connected by rivets 24 upon which are placed spacing sleeves 25 engaging the 1nner faces-of the side plates and thus holding the lsideplates in spaced relation. Upper rollers or rods 26 lare mounted between the side lplates and these upper rollers rest upon "the trolley cable 22. Lower rollers '27 'are rotatably mounted between the side plates and beneath the rollers v26and engage the hoisting cable 28 nwhich extends through the "carriage between the sidewalls and beneath the trolley able 22. It will thus be seen that bot-h 'o fth'ese cables extend between the side platesand betweenthe upper and lower rollers, the upper cable 22 engaging the rollers 26 and the lower cable 28 engaging the rollers 27. `This hoisting cable 28 is connected with thepost or standard 2 and after passing through the carriage 21 is engaged with the pulleyv 4' carried by the post or standard V1 and wound upon the drum 29 of the hoisting engine.V The fall block 30 is mounted upon the hoisting line 28 betweenr the" rollers v27 and from an inspection of Figs.V 1; and 2, it platesA are cut out between the rollers 27 thus providing a pocket 31 to receive the fall block'wlen the hoisting cable'is drawn tight.

lhenthis' hoisting cableis drawn tight7 the allbloek and theportion ofy the cable between the rollers 27 Vwill` assume the position It will'thus be 'through the' carriage in ajstraight line so that' a greatdeal ofthe weight of the logs "connected wit'hth'e haul block lwill be'taken lby the hoisting line. vThe fallV block will be p'r'eventefdr ffrorn Y coming into engagement the rollers" 26v or 27 and'also Vkept jl'ron 'coinngjinto lengagement with the 'ltrolley cable-22 lby the side'fplates "and fricproper stump',

will be seen that'the side.V

at the proper angle Vfor This will cause the carriage the trolley line V"1' and the fall ,block will ofcoursebe'pushed alon'gthev hoisting vline with the-carriage. f

drawnj tight, the' tion will thus be prevented and' alsov ldani ger of jamming'prevented. 'When the hoisting cable or line .isv drawn tight, the carriage'will'be prevented from moving up-y \\ardlyf and therefore the' rollers 26 cannot termedQ-a snubbing line is wound upon the Y drinn 36 of the hoisting engine and after being passedv through. the pulleys 7,16 and 9, will be connected with'the seeondend portion ofthe carriage by rn'eansrof` the shackle 37. By proper operation Yof-the hoisting' engine mechanism which is well known, one of 4the'pulll lines maybe released and the second drawn upon thus permitting the carriage to be moved along the trolley cable towards 'the 'pole or standardl 1 or towards the pole or standard 2. When the vcarriage has reached vthe desiredV point, vrotation of these drums may be stopped and the carriage will be heldin Va setposition. If it is then `desired to'draw the fall blockV downwardly, the drum 19 will be rotated' andthe haul back line or cable V'18 which is Y Vblock downwardlytowards Vthe ground. 'By

lhaving the pulley 17 connected with theV the fall block will be drawn towards one side so-that the hooks of the fall bloclcniay be connected with the :log or logs to be lifted. Of course, when-thefall block .is being drawn downwa'rdly,v the druin vo f the hoisting block has been connected with the log or` unwind from its druin yand the hoisting line will be wound upon its drum to draw the fall block vupwardly tothe dotted line position. During this lifting movement,V thefy carriage will have turned transversely upon the trolley cable and will thusbe vpositioned*` As soon vas the hoisting lifting of the load.

Hlinerhas been drawn tight, rotation 'ofrits windingdrurn will be stopped and the' drum 36 .will be released and the drum 38 rotated to windtheinain pull line 52`u-p'on its druni.- to rmore along or cable towa'1fd's'-the:standard Y line Vwill be permitted vto Vrotate free'1y.1 "After the 'hook Y'of lthe fall the -inost efective- Duringthe vlifting process,l the 'weight lwill Y be carried* 'almost entirely :byfj'the 'trolley cable .but after thelhoisting-lineihas Y been f K fall blocltfwillA rest upon the tightly drawnfcable fwhiclrw-ill now 'conf iso stitute the trolley cable and this cable 28 todrum. The fall block will be carried downwardly by the weight of the load carried. It will thus be seen `that during the lifting process, the carriage may be held stationary upon the trolley cable and'prevented fromk having a tendency to move along the same during the lifting process. It will be fur ther noted that the carriage may swing transversely upon the trolley lcable during the lifting process thus permitting the carriage to assume the proper angle for the effective raising of the load and drawing of the logs along the ground before the actual lifting is commenced. It will be further noted that the carriage may be easily moved longitudinally of the trolley cable with the hoisting cable assisting in carrying the load and further that when the carriage has been returned to the desired position for a second load, the fall block may be effectively drawn downwardly towards the ground and to one side.

claim:

1. A logging system comprising a trolley cable, a carriage slidable upon said trolley cable, a fall block separate from said carriage, a hoisting cable passing through said carriage and fall block and extending in a straight line when drawn tight with the fall block drawn up its full extent, and means for moving the carriage along the trolley cable with the fall block resting upon and moving' along' the tightened hoisting cable.

2. A logging railway comprising a trolley cable, a hoisting cable beneath-said trolley cable, a carriage having upper runners resting upon said trolley cable and lower runners positioned beneath said hoistingcable, and a fall block mounted upon said hoisting cable betweenV the lower runners and movable upwards to a' point permitting said hoisting cable to extend in a straight line through said carriage.

3. The structure of claim 2 having the carriage provided with spaced side plates Y having the upper and lower runners between the same and the cables extending between the side plates and between the upper and lower runners, the intermediate portions of the side plates being cut to provide a pocket receiving the fall block when the hoisting cable is drawn tight.

4. A logging railway comprising a trolley 60- cable, a carriage slidable thereon, a, hoisting cable extending through said carriage, a fall block mounted upon said hoisting cable intermediate the length of said carriage, the carriage being permitted of side swing when said hoistingcable is slack, lines connected with said carriage for moving the carriage alongy said trolley cable, aline connected with said fall block for drawing the fall block down with the hoisting cable released, 70

and means for drawing upon and releasing said cables.

5. A logging system comprising an aerial support, a carriage slidably mounted thereon, ahoisting cable passing through the carriage, a fall block mounted upon the hoisting cable intermediate therlength of said carriage, means for moving the carriage longitudinally upon the aerial support, and means for drawing the fall block downwardly and'to one side, the carriage turning to one side upon the aerial support when the fall block is drawn downwardly and to one side.

6. A logging system comprising. an aerial railway including a trolley cable, a carriage slidable upon the trolley cable, a fall block, a hoisting cable passing through the carriage and engaging the fall block, the hoisting cable. when drawn upon to raise the fall block being drawn tight and constituting an auxiliary trolley cable having the fall block slidably mounted thereon, and means for moving the carriage longitudinally upon the trolley cable.

7. An aerial logging system comprising an aerial railway having a trolley cable, a carriage slidable upon the trolley cable, a load carrier. and means for drawingl the load carrier up into close proximity to said carriage constituting a trolley cable having the load carrier slidable thereon when said means is drawn' tight.

8. A logging system comprising an aerial railway, a carriage slidable longitudinally of the aerial railway, Va load carrier, means for drawing the load carrier upwardly into close proximity to said carriage constituting a track member for the load carrier when the load carrier is in means for imparting movement to said carriage along said railway, the carriage when moving along the aerial railway engaging the load carrier and moving the load carrier along its track member.

In testimony whereof I have hereunto set my hand.

ROBERT H. WHITE.

a raised position, and 

